JEE Main 2020 — Some Basic Concepts Of Chemistry Question with Solution
From: JEE Main 2020 (Online) 3rd September Evening Slot
Question
The strengths of 5.6 volume hydrogen peroxide
(of density 1 g/mL) in terms of mass percentage
and molarity (M), respectively, are:
(Take molar mass of hydrogen peroxide as
34 g/mol)
Choose an option
Show full solutionCorrect option: D
Correct answer
D1.7 and 0.5
Step-by-step explanation
Volume strength = 11.2 × molarity
molarity = = 0.5
Assuming 1 litre solution,
mass of solution = 1000 ml × 1 g/ml = 1000 g
mass of solute = moles × molar mass
= 0.5 mol × 34 g/mol
= 17 gm.
mass % =
= = 1.7 %
molarity = = 0.5
Assuming 1 litre solution,
mass of solution = 1000 ml × 1 g/ml = 1000 g
mass of solute = moles × molar mass
= 0.5 mol × 34 g/mol
= 17 gm.
mass % =
mass of solute
mass of solution
100
= = 1.7 %
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This is a previous-year question from JEE Main 2020, covering the Some Basic Concepts Of Chemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.